I'm looking for a built t56 that can hold up to 500flbt. Or someone who can rebuild it for a decent price. Price range is 1,000 to 1800.

 

Factory rating 94 and up is 450 lb-ft, and that is very conservative. Should have no problem with a stocker behind a 500 lb-ft engine. I ran my factory T56 for two years behind my 800HP/800-lb-ft nitrous setup.